PHENIX first measurement of J/Psi elliptic flow parameter v2 in Au-Au collisions at sqrt(s) = 200 GeV
(2008) In Journal of Physics G: Nuclear and Particle Physics 35.- Abstract
- Recent results indicate that the J/ψ suppression pattern differs with rapidity showing a larger suppression at forward rapidity. J/ψ suppression mechanisms based on energy density (such as color screening, interaction with co-movers, etc) predict the opposite trend. However, it is expected that more pairs should be available to form quarkonia at mid-rapidity via recombination. Some models provide a way to differentiate J/ψ production from initially produced pairs and final state recombination of uncorrelated pairs, via the rapidity and transverse momentum dependence of the elliptic flow (v2). During 2007 data taking at RHIC, a large sample of Au+Au collisions at 200 GeV was collected. The statistics has been increased compared to the... (More)
- Recent results indicate that the J/ψ suppression pattern differs with rapidity showing a larger suppression at forward rapidity. J/ψ suppression mechanisms based on energy density (such as color screening, interaction with co-movers, etc) predict the opposite trend. However, it is expected that more pairs should be available to form quarkonia at mid-rapidity via recombination. Some models provide a way to differentiate J/ψ production from initially produced pairs and final state recombination of uncorrelated pairs, via the rapidity and transverse momentum dependence of the elliptic flow (v2). During 2007 data taking at RHIC, a large sample of Au+Au collisions at 200 GeV was collected. The statistics has been increased compared to the previous 2004 data set, thus allowing a more precise measurement of the J/ψ production at both mid and forward rapidity. Furthermore, the PHENIX experiment benefited from the addition of a new detector, which improves the reaction plane resolution and allows us to measure the J/ψv2. Comparing this measurement to the positive D-mesons v2 (through non-photonic electron decays) will help in constraining the J/ψ production mechanisms and getting a more precise picture of the proportion of J/ψ coming from direct production or charm quark coalescence. Details on how the J/ψv2 is measured at mid-rapidity are presented. The J/ψv2 as a function of transverse momentum are compared with the existing models. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1432202
- author
- Silvestre, C. ; Christiansen, Peter LU ; Gustafsson, Hans-Åke LU ; Haslum, Eva LU ; Oskarsson, Anders LU ; Rosendahl, Sarah LU and Stenlund, Evert LU
- organization
- publishing date
- 2008
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Physics G: Nuclear and Particle Physics
- volume
- 35
- article number
- 104136
- publisher
- IOP Publishing
- external identifiers
-
- scopus:54749112629
- ISSN
- 0954-3899
- DOI
- 10.1088/0954-3899/35/10/104136
- language
- English
- LU publication?
- yes
- id
- ea658d99-4a2b-429b-ae0c-bc38a99ff5ff (old id 1432202)
- date added to LUP
- 2016-04-01 14:04:42
- date last changed
- 2023-01-04 02:29:38
@article{ea658d99-4a2b-429b-ae0c-bc38a99ff5ff,
abstract = {{Recent results indicate that the J/ψ suppression pattern differs with rapidity showing a larger suppression at forward rapidity. J/ψ suppression mechanisms based on energy density (such as color screening, interaction with co-movers, etc) predict the opposite trend. However, it is expected that more pairs should be available to form quarkonia at mid-rapidity via recombination. Some models provide a way to differentiate J/ψ production from initially produced pairs and final state recombination of uncorrelated pairs, via the rapidity and transverse momentum dependence of the elliptic flow (v2). During 2007 data taking at RHIC, a large sample of Au+Au collisions at 200 GeV was collected. The statistics has been increased compared to the previous 2004 data set, thus allowing a more precise measurement of the J/ψ production at both mid and forward rapidity. Furthermore, the PHENIX experiment benefited from the addition of a new detector, which improves the reaction plane resolution and allows us to measure the J/ψv2. Comparing this measurement to the positive D-mesons v2 (through non-photonic electron decays) will help in constraining the J/ψ production mechanisms and getting a more precise picture of the proportion of J/ψ coming from direct production or charm quark coalescence. Details on how the J/ψv2 is measured at mid-rapidity are presented. The J/ψv2 as a function of transverse momentum are compared with the existing models.}},
author = {{Silvestre, C. and Christiansen, Peter and Gustafsson, Hans-Åke and Haslum, Eva and Oskarsson, Anders and Rosendahl, Sarah and Stenlund, Evert}},
issn = {{0954-3899}},
language = {{eng}},
publisher = {{IOP Publishing}},
series = {{Journal of Physics G: Nuclear and Particle Physics}},
title = {{PHENIX first measurement of J/Psi elliptic flow parameter v2 in Au-Au collisions at sqrt(s) = 200 GeV}},
url = {{http://dx.doi.org/10.1088/0954-3899/35/10/104136}},
doi = {{10.1088/0954-3899/35/10/104136}},
volume = {{35}},
year = {{2008}},
}